High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

14.5.2.7Port x MAC Receive 256 to 511 Byte Count Register (MAC_RX_256_TO_511_CNT_x)

Register #:

Port0: 0414h

Size:

32 bits

 

Port1:

0814h

 

 

 

Port2:

0C14h

 

 

This register provides a counter of received packets between the size of 256 to 511 bytes. The counter is cleared upon being read.

BITS

 

DESCRIPTION

TYPE

DEFAULT

 

 

 

 

31:0

RX 256 to 511 Bytes

RC

00000000h

 

Count of packets (including bad packets) that have between 256 and 511

 

 

 

bytes.

 

 

 

 

Note:

This counter will stop at its maximum value of FFFF_FFFFh.

 

 

 

 

Minimum rollover time at 100Mbps is approximately 1581 hours.

 

 

 

 

 

 

 

Note: A bad packet is defined as a packet that has an FCS or Symbol error. For this counter, a packet that is not an integral number of bytes is rounded down to the nearest byte.

Revision 1.4 (08-19-08)

328

SMSC LAN9312

 

DATASHEET